Different texture formats

[LoneWanderer1987]

Every time get a nice model somewhere I only use the diffuse file but i know using the normal maps and specular would make it look even better but they always come out very shiney any way to covert them for new vegas use?

[StealthDick]

I think you can adjust their values in NifSkope, it should be in the NiMaterial part of your model if Im not mistaken.

[Pixelhate]

Everything you want to know about Normal Map, Specularity and Glossiness is in part 03B of this tutorial: https://www.nexusmods.com/newvegas/mods/76374?tab=files